Which type of force is being used in pulling the cart? Is it contact or non-contact force?

Who is applying the force in the given figure?

Which type of force is being used in this picture?

When the boy pushes the ring, why does the speed of the ring increase?

A hot piece of iron is hammered by a blacksmith. How does the force due to hammering affect it?

Which force is responsible for the attraction between an inflated balloon rubbed with a synthetic cloth and a wall?

Which force acts on a plastic bucket containing water held above the ground in a hand? Why does this force not bring any change in the state of motion of the bucket?

Which two forces immediately act on a rocket fired upwards?